$10 - $20 off The Sims 3 and Expansions ($9.99 - $29.99)

Retailer: Best Buy

Platforms: PC

Link: http://bit.ly/WygVGc 

The sheer volume of Sims expansions that get released kind of creeps up on you if you're not paying attention. Best Buy's got a whopping 18 of them on sale, each at $10 - $20 off, meaning if you're an obsessive compulsive collector, you can snag 'em all for relatively cheap.